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GB1334618A - Preparation of 4,4-isomer of diaminodiphenylmethane - Google Patents

Preparation of 4,4-isomer of diaminodiphenylmethane

Info

Publication number
GB1334618A
GB1334618A GB5924171A GB5924171A GB1334618A GB 1334618 A GB1334618 A GB 1334618A GB 5924171 A GB5924171 A GB 5924171A GB 5924171 A GB5924171 A GB 5924171A GB 1334618 A GB1334618 A GB 1334618A
Authority
GB
United Kingdom
Prior art keywords
diaminodiphenylmethane
weight
isomers
polyamines
isomer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5924171A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JEFFERSON CHEMICAL CO Ltd
Original Assignee
JEFFERSON CHEMICAL CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JEFFERSON CHEMICAL CO Ltd filed Critical JEFFERSON CHEMICAL CO Ltd
Publication of GB1334618A publication Critical patent/GB1334618A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
    • C07C205/27—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups
    • C07C205/35—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C205/36—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton to carbon atoms of the same non-condensed six-membered aromatic ring or to carbon atoms of six-membered aromatic rings being part of the same condensed ring system
    • C07C205/38—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by etherified hydroxy groups having nitro groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton to carbon atoms of the same non-condensed six-membered aromatic ring or to carbon atoms of six-membered aromatic rings being part of the same condensed ring system the oxygen atom of at least one of the etherified hydroxy groups being further bound to a carbon atom of a six-membered aromatic ring, e.g. nitrodiphenyl ethers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1334618 Diaminodiphenylmethane and polyamines JEFFERSON CHEMICAL CO Inc 21 Dec 1971 [26 Jan 1971] 59241/71 Heading C2C Diaminodiphenyl methane and polyamines having a functionality greater than two are prepared by a process which comprises reacting aniline with formaldehyde, the improvement being wherein all or a portion of the 2,2<SP>1</SP>- and 2,4<SP>1</SP>-isomers of diaminodiphenylmethane are separated from the diaminodiphenylmethane produced and recycled to the aniline-formaldehyde feed, so that there is little or no net make of the 2,2<SP>1</SP>- and 2,41 isomers of diaminodiphenylmethane and less than 10% by weight of the 2,2<SP>1</SP>- and 2,4<SP>1</SP>-isomers in the diamine fraction of the product. The final product preferably contains from about 25% by weight polyamine and 75% by weight diaminodiphenylmethane to about 65% by weight polyamine and 35% by weight diaminodiphenylmethane.
GB5924171A 1971-01-26 1971-12-21 Preparation of 4,4-isomer of diaminodiphenylmethane Expired GB1334618A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US109979A US3860637A (en) 1971-01-26 1971-01-26 Selective manufacture of 4,4{40 -isomer of diaminodiphenyl-methane

Publications (1)

Publication Number Publication Date
GB1334618A true GB1334618A (en) 1973-10-24

Family

ID=22330618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5924171A Expired GB1334618A (en) 1971-01-26 1971-12-21 Preparation of 4,4-isomer of diaminodiphenylmethane

Country Status (6)

Country Link
US (1) US3860637A (en)
JP (1) JPS5623979B1 (en)
CA (1) CA993893A (en)
DE (1) DE2202500A1 (en)
FR (1) FR2124752A5 (en)
GB (1) GB1334618A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025128774A1 (en) * 2023-12-13 2025-06-19 Dow Global Technologies Llc Method for making methylene dianiline and polymethylene polyanilines

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971829A (en) * 1974-11-18 1976-07-27 Jefferson Chemical Company, Inc. Preparation of methylene-bridged polyphenylpolyamine mixtures
DE2528694C2 (en) * 1975-06-27 1982-04-22 Bayer Ag, 5090 Leverkusen Process for the preparation of polynuclear aromatic polyamines
US4039580A (en) * 1975-07-24 1977-08-02 The Upjohn Company Process for preparing di(aminophenyl)methanes
US4029705A (en) * 1975-08-18 1977-06-14 The Upjohn Company Purification process for MDA
US4028361A (en) * 1975-08-18 1977-06-07 The Upjohn Company Process for the purification of MDA
DE2557500A1 (en) * 1975-12-19 1977-06-30 Bayer Ag PROCESS FOR PRODUCING POLYAMINES
DE2557501A1 (en) * 1975-12-19 1977-06-30 Bayer Ag PROCESS FOR PRODUCING POLYAMINES
DE10006452A1 (en) 2000-02-14 2001-08-16 Bayer Ag Production of diaminophenyl methanes, useful for production of polyurethanes, comprises acid catalyzed rearrangement of a dried condensate of aniline and a methylene group containing agent
DE10031540A1 (en) * 2000-06-28 2002-01-10 Basf Ag Production of aromatic polyamine mixture comprising 4,4'-methylenedianiline and higher homologs involves reacting aniline with formaldehyde using split stream of formaldehyde
US20110021741A1 (en) * 2008-04-16 2011-01-27 Dow Global Technologies Inc. Process for making polyaminopolyphenyl methanes using a mixed solid acid catalyst system
CN102399155B (en) * 2011-12-29 2014-03-26 河南省华鼎高分子合成树脂有限公司 Method for preparing 4,4-methylenedianiline
EP3166922B1 (en) 2014-07-07 2018-03-14 Covestro Deutschland AG Process for the production of di- and polyamines of the diphenylmethane series
US11028042B2 (en) 2016-01-20 2021-06-08 Basf Se Process for preparing an aromatic polyamine mixture
US10538480B2 (en) 2016-06-30 2020-01-21 Covestro Deutschland Ag Process for the production of di- and polyamines of the diphenylmethane series

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974168A (en) * 1955-09-19 1961-03-07 Monsanto Chemicals Process for making methylenedianiline
US3297759A (en) * 1964-01-13 1967-01-10 Upjohn Co Continuous process for producing mixtures of methylene-bridged polyphenyl polyamines
US3517062A (en) * 1966-08-05 1970-06-23 Mobay Chemical Corp Process for the preparation of substantially pure 4,4'-diaminodiphenylmethane
US3476806A (en) * 1969-08-13 1969-11-04 Du Pont Continuous methylenedianiline process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025128774A1 (en) * 2023-12-13 2025-06-19 Dow Global Technologies Llc Method for making methylene dianiline and polymethylene polyanilines

Also Published As

Publication number Publication date
FR2124752A5 (en) 1972-09-22
DE2202500A1 (en) 1972-08-10
CA993893A (en) 1976-07-27
JPS5623979B1 (en) 1981-06-03
US3860637A (en) 1975-01-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee